26220090 has 32 divisors (see below), whose sum is σ = 67769856. Its totient is φ = 6454080.

The previous prime is 26220083. The next prime is 26220091. The reversal of 26220090 is 9002262.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26220091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33226 + ... + 34005.

It is an arithmetic number, because the mean of its divisors is an integer number (2117808).

Almost surely, 2^26220090 is an apocalyptic number.

26220090 is an abundant number, since it is smaller than the sum of its proper divisors (41549766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26220090 is a wasteful number, since it uses less digits than its factorization.

26220090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67254.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 26220090 is about 5120.5556339132. Note that the first 3 decimals coincide. The cubic root of 26220090 is about 297.0831768306.

It can be divided in two parts, 26 and 220090, that added together give a triangular number (220116 = T₆₆₃).

The spelling of 26220090 in words is "twenty-six million, two hundred twenty thousand, ninety".